Thermal decomposition of wood: Kinetics and degradation mechanisms

Poletto, Matheus; Zattera, Ademir J.; Santana, Ruth Marlene Campomanes

doi:10.1016/j.biortech.2012.08.133

Cited by 251 publications

(123 citation statements)

References 33 publications

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“…The correlation coefficients obtained for the methods were fairly high, which attests to the reliability of the models [25]. Generally, the trends of the apparent activation energy for both methods and samples are fairly comparable; reaching a peak of 171.78 and 187.73 kJ mol respectively for Friedman's and Starink's.The apparent activation energy obtained for both methods were within the range reported for biomass residues [36,40]. For both BSG and extractive-free BSG, the average value of the apparent activation energy returned by Friedman's model was comparatively higher than Starink's; this is similar to an earlier observation made in literature [24].…”

Section: Tga and Kinetic Datasupporting

confidence: 79%

Thermo-kinetic, spectroscopic study of brewer’s spent grains and characterisation of their pyrolysis products

Balogun

Sotoudehniakarani

McDonald

2017

Journal of Analytical and Applied Pyrolysis

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A B S T R A C TBrewer's spent grains, major by-products of the beverage industries, were obtained from a Nigerian brewery and subjected to pyrolysis at 500°C. Analytical pyrolysis (Py-GC/MS) was conducted on the original BSG, extractivefree BSG and BSG CH 2 Cl 2 extract. There was a marked difference in the concentration of levoglucosan between the extractive-free BSG (40.5%) and the original BSG (11.5%). The Py-GC/MS detected significant amount of palmitic and oleic acids in the three samples. Prior to pyrolysis, the extractives content were isolated through methanolysis, transesterified and subjected to GC/MS analysis. The analysis revealed the presence of linoleic, oleic and palmitic acids in an appreciable quantity. The BSG and its biochar were also characterised according to Fourier transform infrared and Raman spectroscopic, and thermogravimetric analyses alongside some conventional physico-chemical analysis. The total crystallinity and condensation indices were evaluated from specific FTIR spectra peaks so as to monitor structural transformations in the bio-char. Kinetic data were deduced from TGA measurements and it was apparent that thermal decomposition of BSG is better modelled as a multi-step reaction mechanism. The nitrogen content of the bio-char was relatively high making it a suitable feedstock for the production of in situ nitrogenised activated bio-carbon. There was a significant variation between the structural configuration of the original BSG and the bio-char as revealed by the change in the value of the condensation index as well as the cellulose crystallinity content. It may thus be concluded that the BSG biomass would be a viable feedstock for thermal decomposition and other valorisation processes.

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Section: Tga and Kinetic Datasupporting

confidence: 79%

Thermo-kinetic, spectroscopic study of brewer’s spent grains and characterisation of their pyrolysis products

Balogun

Sotoudehniakarani

McDonald

2017

Journal of Analytical and Applied Pyrolysis

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“…Similarly, Bari et al (2015) attributed the 1223 cm -1 peak emergence to the lignin syringyl ring, which refers to the C-O stretching between lignin and xylose. The 1220 and 1110 cm -1 bands featured vibrational stretching of many lignin and carbohydrate groups (Poletto et al, 2012), which showed that lignin-hemicellulose bonds were cleaved during biological deterioration.…”

Section: Resultsmentioning

confidence: 99%

Resistance of TiO2-treated Eucalyptus botryoides Wood to the Fungus Ganoderma applanatum

et al. 2018

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The aim of the present study is to investigate the resistance of Eucalyptus botryoides treated with TiO 2 particles to attack by the fungus Ganoderma applanatum. The Bethel treatment method was applied to wood specimens (25 × 25 × 9 mm) and compared to CCB. The wood was subjected to the accelerated decay test and characterized through Rockwell Hardness and Fourier Transform Infrared Spectroscopy (FT-IR). The TiO 2 -treated wood showed lower degradation and greater resistance to the penetration of a steel sphere (Rockwell Hardness) than the untreated wood. In addition, the results of the TiO 2 treatment were statistically equal to those of CCB. The FT-IR analysis showed that the fungus degraded lignin and hemicellulose in untreated samples. The present results showed the TiO 2 efficiency in forming a protective layer on the cell wall and in preventing the development of microorganisms, a fact that verifies its fungicidal action on wood.

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“…Beberapa studi terdahulu telah menggunakan analisis TGA untuk berbagai material seperti plastik (Aigbodion & Hassan, 2012;Zhou et al, 2006), serat alam (Yao et al, 2008), biomassa (Slopiecka et al, 2011;Ahiduzzaman & Islam, 2015;Poletto et al, 2012), limbah elektronik (Quan et al, 2013), logam transisi (Chaudary et al, 2016), biodiesel (Dwivedi & Sharma, 2016), karet dan campuran karet (Komalan et al, 2008;Li et al, 2010;Alneamah & Almaamori, 2015;Paul & Joseph, 2014;Vijayalekshmi & Majeed, 2013;Iqbal et al, 2015;Brostow et al, 2011), dan resin (Kandare et al, 2008;Tibiletti et al, 2011;Sholeh et al, 2015).…”

Section: Pendahuluanunclassified

Karakteristik termogravimetri dan kinetika dekomposisi EPDM dengan bahan pengisi carbon black

Mayasari

Yuniari

2016

MKKP

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The thermal characteristics of a material are important to learn in order to know the thermal stability of the materials. Ethylene propylene diene monomer (EPDM) is a synthetic rubber that is widely used in industry dueto its resistance to aging, ozone, and chemicals. The kinetic parameters and thermal decomposition of vulcanized EPDM were studied using thermogravimetric method with various vulcanization systems (efficient, semi-efficient, and conventional vulcanization system) and various carbon black (CB) as filler (50, 60, and 70 phr ABSTRAKKarakteristik termal suatu material penting untuk dipelajari untuk mengetahui stabilitas termal bahan tersebut. Etilen propilen diena monomer (EPDM) adalah salah satu karet sintetis yang banyak digunakan dalam industri karena ketahanan terhadap aging, ozon, dan kimia yang baik. Pada studi ini akan dipelajari parameter kinetika dan sifat dekomposisi termal vulkanisat EPDM dengan metode termogravimetri dari berbagai variasi sistem vulkanisasi (efisien, semi-efisien, dan konvensional) dan variasi carbon black (CB) (50,60, dan 70 phr) sebagai bahan pengisi. Dekomposisi terjadi dalam dua tahap; oksidasi EPDM dan hilangnya bahan mudah menguap kemudian dekomposisi EPDM. Parameter kinetika dekomposisi termal didekati dengan persamaan Coats Redfern. Energi aktivasi dan massa yang terdekomposisi meningkat dengan berkurangnya kandungan CB. Vulkanisat EPDM dengan bahan pengisi CB memiliki ketahanan cukup baik terhadap dekomposisi termal. Proses dekomposisi dapat dilihat secara detail pada paper ini.Kata kunci: EPDM, dekomposisi termal, kinetika, termogravimetri, carbon black. PENDAHULUANMaterial polimer yang telah mengalami proses pengolahan, penggunaan, dan penyimpanan akan mengalami degradasi karena pengaruh suhu dan waktu. Degradasi ini dapat disebabkan oleh bahan kimia seperti pemutusan ikatan dan oksidasi atau perubahan fisik yang menghasilkan bahan dengan sifat yang berbeda dalam struktur polimernya. Pada umumnya sifat fisika dan sifat mekanis akan menurun. Tingkat perubahan sifat termal oleh pengaruh suhu disebut sebagai ukuran stabilitas termal suatu bahan (Alneamah & Almaamori, 2015).EPDM adalah karet nonpolar dan memiliki sedikit ikatan tidak jenuh sehingga memiliki sifat ketahanan yang baik terhadap bahan kimia, cuaca, dan pengusangan. Rumus struktur EPDM dapat dilihat pada Gambar 1. EPDM adalah salah

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Thermal decomposition of wood: Kinetics and degradation mechanisms

Cited by 251 publications

References 33 publications

Thermo-kinetic, spectroscopic study of brewer’s spent grains and characterisation of their pyrolysis products

Thermo-kinetic, spectroscopic study of brewer’s spent grains and characterisation of their pyrolysis products

Resistance of TiO2-treated Eucalyptus botryoides Wood to the Fungus Ganoderma applanatum

Karakteristik termogravimetri dan kinetika dekomposisi EPDM dengan bahan pengisi carbon black

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